Question

a student places five books next to each other on their ends. she then pushes the first book with her finger, and a few seconds later, the last book falls. which statement is correct about this chain of events? (1 point) the force of the finger causes the books to accelerate and fall. there is a positive correlation between the force of the finger and number of books. there is causation between the force of the finger and the number of books. the acceleration of the books as they fall causes the force of the finger.

Explanation:

• Option 1: When the finger applies a force on the first book, according to Newton's second law \(F = ma\) (where \(F\) is force, \(m\) is mass, and \(a\) is acceleration), the force causes the books to accelerate. As the first - book moves, it transfers energy (through collisions) to the subsequent books, eventually causing the last book to fall.
• Option 2: A positive correlation implies that as one variable (force of the finger) increases, the other variable (number of books) increases. But the number of books is a fixed quantity (\(n = 5\) in this case) and not related to the force of the finger in a correlational sense.
• Option 3: Causation between the force of the finger and the number of books is incorrect. The number of books is a pre - determined quantity (\(n=5\)) and not caused by the force of the finger.
• Option 4: The force of the finger is the initial cause. According to Newton's third law, there is a reaction force, but the acceleration of the books is the result of the applied force (from the finger and the subsequent book - to - book forces), not the cause of the finger force.

Answer:

The force of the finger causes the books to accelerate and fall.